Des chercheurs conçoivent la première horloge à grand-père quantique

27 mai 2026

Rapporté par l'IA

Des scientifiques ont créé la première conception complète d'une version quantique d'une horloge à pendule utilisant un seul atome, des miroirs et de la lumière. Le dispositif pourrait faire progresser la compréhension de la mesure du temps à l'échelle quantique.

Matteo Brunelli, du Collège de France, et ses collègues ont développé un modèle mathématique qui reproduit les éléments clés d'une horloge à grand-père traditionnelle avec des composants quantiques. Leur conception comprend une cavité formée par deux miroirs se faisant face, dont l'un oscille, ainsi qu'un atome qui effectue des transitions entre des états énergétiques et émet des photons pour entraîner le mouvement. L'atome sert de mécanisme d'échappement, assurant des tic-tacs stables sans contrôle externe.

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